**(a). C(2.34)**

The given function is C(r) = 2πr,

Put r = 2.34, we have,

C(2.34) = 2π(2.34) = 2 × 3.14159 × 2.34 = 14.7 inches.

**(b). C(6.41 m)**

The given function is C(r) = 2πr,

Put r = 6.41 m, we have,

C(6.41 m) = 2π(6.41) = 2 × 3.14159 × 6.41 = 40.275 = 40.3 m

**(c). C(5/11 in)**

The given function is C(r) = 2πr,

Put r = 5/11 in, we have,

C(5/12 in) = 2π(5/11) = 2 × 22/7 × 5/11 = 20/7 = 2.856 in

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